Content of essential oil, terpenoids and polyphenols in commercial chamomile (Chamomilla recutita L. Rauschert) teas from different countriesRaal, Ain; Orav, Anne; Püssa, Tõnu; Valner, Catri; Malmiste, Birgit; Arak, ElmarFood chemistry2012 / p. 632-638 : ill https://www.sciencedirect.com/science/article/pii/S0308814611013008